CVE-2024-38575

Kernel crash via unchecked randbuf allocation

Published Jun 19, 2024 · Updated May 23, 2026

Null pointer dereference in the Linux brcmfmac PCIe driver allows local users to crash the system during firmware loading. The brcmf_pcie_download_fw_nvram() function passes a randbuf returned as NULL by kzalloc() to get_random_bytes(). Exploitation requires low-privileged local access, allocation failure, and use of the Broadcom PCIe firmware-loading path; the bounded impact is a kernel crash.

CVSS severity5.5
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in the Linux brcmfmac PCIe driver allows local users to crash the system during firmware loading. The brcmf_pcie_download_fw_nvram() function passes a randbuf returned as NULL by kzalloc() to get_random_bytes(). Exploitation requires low-privileged local access, allocation failure, and use of the Broadcom PCIe firmware-loading path; the bounded impact is a kernel crash.

The record

CVE
CVE-2024-38575
Published
Jun 19, 2024
Updated
May 23, 2026
Vendor
The Linux Kernel Organization
Product
Linux
Classifications
CWE-476, T1499.004
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Jun 19, 2024CVE publishedPublication date reported by the CVE source.
  2. May 23, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=6.1.30 <6.1.93
  2. Affected versionversion=6.3.4 <6.4
  3. Affected versionversion=6.4
  4. Affected versionversion=91918ce88d9fef408bb12c46a27c73d79b604c20 <316f790ebcf94bdf59f794b7cdea4068dc676d4c
  5. Affected versionversion=91918ce88d9fef408bb12c46a27c73d79b604c20 <3729ca9e48d19a03ae049e2bde510e161c2f3720
  6. Affected versionversion=91918ce88d9fef408bb12c46a27c73d79b604c20 <7c15eb344b0d4d3468c9b2a7591ad2b859b29b88
  7. Affected versionversion=91918ce88d9fef408bb12c46a27c73d79b604c20 <c37466406f075476c2702ecc01917928af871f3b
  8. Affected versionversion=ba72baed066f3bfa8b489e4b58f1fcaf51c04f83
  9. Affected versionversion=c35105f375b530bc27e03ea9250b1c26dd4cae86 <0eb2c0528e232b3c32cde9d5e1c9f80ba2996e49

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

The Linux Kernel Organization · Linuxversion=6.1.30 <6.1.93; version=6.3.4 <6.4; version=6.4; version=91918ce88d9fef408bb12c46a27c73d79b604c20 <316f790ebcf94bdf59f794b7cdea4068dc676d4c; version=91918ce88d9fef408bb12c46a27c73d79b604c20 <3729ca9e48d19a03ae049e2bde510e161c2f3720; version=91918ce88d9fef408bb12c46a27c73d79b604c20 <7c15eb344b0d4d3468c9b2a7591ad2b859b29b88; version=91918ce88d9fef408bb12c46a27c73d79b604c20 <c37466406f075476c2702ecc01917928af871f3b; version=ba72baed066f3bfa8b489e4b58f1fcaf51c04f83; version=c35105f375b530bc27e03ea9250b1c26dd4cae86 <0eb2c0528e232b3c32cde9d5e1c9f80ba2996e49

Published CVSS scores

5.5NIST NVDCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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